﻿<blockquote class="extDef">NOTE&nbsp; Definition according to ISO/CD 10303-42:1992<br>
This function returns a direction which is the orthogonal complement of the
input direction. The input direction must be a two-dimensional
direction and the result is a vector of the same type and perpendicular
to the input vector.</blockquote>

<blockquote class="note">NOTE&nbsp; Function adapted from <strong>orthogonal_complement</strong> defined in ISO 10303-42.</blockquote>
<blockquote class="history">HISTORY&nbsp; New function in IFC1.5</blockquote>
